Not really, most universal type race sprockets come in a 520 pitch, and all the reputable manufacturers make their race chains 520, for lightness more than anything else, but really there are few benefits. The race teams can change chains after every race - it gets a bit expensive for ordinary joes to do that
As above far easier to get alloy sprockets..in theory the lesser weight means less resistance (if maintained) equals more rwhp. Enjoy the extra 0.35 Ho
less parasitic losses george. Depends on how much you want to spend, as a powerful engine will go through a 520 chain like sweets. Obviously if you're ultra tight fill your boots with a 532 and take down small buildings. 520 might be loved by short circuit racers, but the endurance teams love a 525
